Girl Boss Blues: Queen Bee’s Counterattack (1971)

aka’s: Sukeban Burusu – Mesubachi No Gyakushu/ Queen Bee Strikes Again/
女番長ブルース 牝蜂の逆襲

Reiko Ike stars as the hustling boss of a girl biker gang who bites off more than she can chew when she goes against a rival trying to take her position and a yakuza group who wants her off of their turf. Features the infamous sex-on-a-motorcycle-last-one-to-come-wins-race scene! (In Japanese language).